Sabbath's Die Young has always gotten my blood pumping, especially after Dio died. His voice is just so damn powerful, and the song is so epic and uplifting while maintaining Sabbath's trademark heaviness.
Limelight by Rush is another one. If I've had a few beers when Lifeson breaks into that solo... oh man, that shit kicks my ass!
I love inside jokes, I'd love to be a part of one some day.